I understand how to sort all tasks and save views in a project, but what if I only want to sort some tasks? For example, I’ve got several sections of tasks and I’d like all the tasks in one section to be sorted alphabetically and the tasks in a different section to be sorted manually.

Is it possible to select only some tasks in a project and sort them according to a rule/view without affecting the other (unselected) tasks?

This would be a great new feature for me too, so I second the request.

My main use case is in My Tasks. Within Upcoming I keep an Agenda section which I manually keep sorted by due date. It would be wonderful if I could designate this section to be sorted by due date automatically, or even (a simpler Asana feature change) if I just had a command to sort selected tasks this way on demand manually.

(The Agenda section in My Tasks is a big time saver for me, even with a bit of manual effort involved, because it reduces my need to switch sometimes to Calendar View for My Tasks, or sometimes sort all of My Tasks by Date. I’ve been using My Tasks this way for a long time and it means I get a great overview of present and key future tasks/appointments all in a single view.)

Bridge24 for Asana is a great external tool to do that. You can filter some tasks with criteria, then you can sort and group them the way you want in a regular grid view. You can also export those tasks to Excel and do extra manipulation if you want.

Request is to allow sorting of selected tasks (currently only all tasks may be sorted. In addition, sorting a section’s tasks would be helpful too.
Several posts request this, so adding here at the suggestion of @Michael_A. (Hope that’s ok, @Mary_Conquest. Vote here!
Recent related thread is quoted below, but I see there’s also part of this request mentioned in Sort tasks by Due Date WITHIN Sections along with references there as well.